Rebound check



July 14, 1925.

R. T. NEWTON REBOUND CHECK Filed Nov. 15 1922 3 Sheets-Sheet 1 M R0 m m?BYk/w Jul 14, 1925.

R. T. NEWTON REBOUND CHECK Filed Nov. l5. 1922 3 Sheets-Sheet 2 B yElm-man KNEW rm A TTORNE Y6 Jul 14, 1925.

1,546,305 R. T. NEWTON REBOUND CHECK 1922 5 Sheets-Sheet 3 Filed Nov. l5

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v INVENTOR BY H/EHHRDTNEWT N A TTOXNE Y w Fatcnted July 14, 1925.

RICHARD T. NEWTON, OF NEW YORK, N. Y. l

REBOUND annex.

Application filed November 13, 1922. Serial No. 600,649.

To all whom it may concern:

Be it known that I, RICHARD T. NEWTON,

' a citizen of the United States of America,

residing at New York city, borough of Manhattan, in the county of NewYork and State of New York, have invented certain new and usefulImprovements in Rebound Checks, of which the following is aspecification.

My invention relates to rebound checks, and particularly to a device ofthis type for use on an automobile, or other vehicle having a bodyspring supported from the running gear. The object of my invention is toprovide a device which is simple to manufacture, efficient in operation,and affords Fig. is a vertical section through the device in assembledposltion and under stress;

'Fig. 6 is an inverted plan, viewed from the direction. indicated at6-6, Fig. 5;

Fig. 7 is a section similar to Fig. 5, but showing the parts in releaseposition;

Fig. 8 is a face view of the frame;

Fig. '9 is a side elevation thereof;

Fig. 10 is a broken section through a modiiied construction; and

Fig. 11 is a section on the line 1111, Fig."10.

' he present rebound check device may be adapted to various types ofvehicles, and

' sam yp to various constructions in vehicles of the I have shown it inthe accompanying drawings adapted particularly for use on automobiles.Its mounting on the latter may be variously modified, but I haveillustrated, for example, a carrying bracket 15 adapted to be secured toa chassis side bar 16 in any suitable way, as by means of a bolt 17passing therethrough, and a supporting log or hook 18 overlying theupper flange of the side bar to assist in rigidly securing the bracketthereto. The frame 19 of the device may be in the form of a discappropriately tapped to receive screw b olts 20, by which it is securedto the bracket 15. On the frame is a fixed stud 21, surrounded by ananti-friction bearin bush 22.

Iounted eccentrically on the stud by the bearing 23, is what may forconvenience be termed a friction drum 24, the oscillation of which onthe stud is limited by a stop pin on the frame 19. which engages in aslot 26 in the side web 27 of the drum. The web 27 carries a springanchor pin 28 .to which is secured one end of the spiral return spring29. To the opposite and free end of the return spring is secured one endof the friction band 30, which passes through the interrupted area 31 ofthe drum and around the periphery of the latter, being carried downtherefrom to any suitable attaching means by which the other end of thefriction band is secured to the running gear. In the present example Ihave shown this end of the band attached to a clamp 32 mounted beneathand secured to the wheel axle 33 by a clamping bolt 34.

Also mounted on the stud 21 is a friction shoe 35, here shown integralwith the side flange 36, which terminates in a pair of bearing lugs 37straddling the bearing 23 of the friction drum on the stud 21. The sideflange 36 of the shoe is laterally oiiset from the bearing lugs 37 toclear the side margin of the drum, and the parts are so proportionedthat in assembled position the shoe partially surrounds the drum and iscircumferentially spaced from the latter a sufiicient distance toaccommodate between them the friction band 30. At the free end of theshoe are provided abutment lugs 38 pierced to receive the pin 39 bywhich the, anchorbolt 40 is secured thereto. The latter passes throughthe eye 41 in the offset stop lug 42 of the frame 19, and has screwed",

thereon a thrust nut 43, between which and the stop lug 42. isinterposed a pressure spring 44. The nut 43 may be provided with agraduated scale 45 (see Fig.- 6) with which cooperates the pointer 46securedto the stop lug 41 on the frame 19; The position of the nutwith"respect"totthe pointer may be thus used to indicate the degree of.stress placed upon thespring 44, the effort 1 of which may thus beregulated to 'vary the frictional grip on the band 30 in accordance withthe weight of the chassis and its associated car body elements.

The drum is conse uentl biased away from the shoe 35, but is alte by thestop pin which enga es at one end of the slot 26 in the web 0 the drum.The shoe 35 is stressed in the same direction by its spring 44, but isprevented from following the drum by the impingement of its stop lugsagainst the stop lug 42 of the frame. The iin'ction band 30 is thus freeto play in the circumferential space afforded between the exterior oftlmdrum and the adjacent inner face of the shoe On the upward throw ofthe chassis 16 with respect to the running gear or axle33, however, theband 30 is pulled downward at its running gear end, while its oppositeend is held in contact with the drum by the stress of the spring 29. Thedrag thus exerted upon the drum overcomes the pull of the spring 29 andtends to swing the drum bodily in the direction of the arrow Y (Fig. onthe bearing stud 21. This rocks the drum towards the shoe and engagesthe friction strap between the opposed surfaces of the shoe and drumwith a friction grip dependent upon the rtess of the pressure spring 44.The upward throw of the chassis is thus checked.

It is obvious that the length of the slot 26 in which the stop 25 playsmay be varied. I have indicated it as rather short in order to preventthe throw of the drum against the shoe to an extent which might causethe latter to swing outward a sufficient distance to rupture the housing47 which is mounted upon the frame 19. This casing encloses the partsexcept for apertures 48 to permit the play of the stop lu'g 42, pressurespring 44; and the associated parts of the shoe. The housing may beshaped if desired to wholly enclose the latter savefor the opening 48through.

. gaging between them the friction band 30.

he shoe 35 forms a yielding abutment, the

resistance of which is determined by the spring 44, while the drum 24 isforced out a ainst this yielding abutment by thedrag o the friction bandand the eccentric mounting of the drum. A quick grip upon the frictionband is secured by the construction, while at the same time the checkingeffect the band, and 49 to accommodate is not objectionably sudden,since the shoe is yieldably restrained and imposes its gripping efi'ortprogressively on the strap.

The device is simple to manufacture, assemble and install; it is notreadily put out of order, and is eflicient in operation.

In Figs. 10 and 11 I have shown a modified construction, in which theshoe 50 is rigid with the base and only the drum swings. In order toforce the drum away from the shoe after the checking action iscompleted, I provide a spring 51 housed in a boss 52 rigid with theframe and acting on the drum through a plunger 53 and strut 54. In orderto take up wear, the strut may have associated with it a pawl 55 rigidwith the strut axis 56 and pressed by the leaf spring 57 againstthe'inner face of the strap. As the strap wears and becomes thinner, thechange in position of the pawl 55 causes the link 54 to change itsangular gosition with respect to the plunger 53. bviously, in thisconstruction the pull on thestrap 30 throws the drum out against therigid abut ment shoe To insure the immediate freeing of the drum and theconsequent winding-up of the strap 30 at the end of the checking action,the drum is forced by the spring 51 away from the fixed abutment shoe50, hus permitting the strap to freely slip around the drum and wind upon the spiral return spring 29.

This modification involves the same idea of an eccentrically mounteddrum moving against an abutment under the pull of the friction band, toobtain a gripping action on the latter. I prefer, however, theconstruction first shown with the yielding abutment, since a gentleraction is thus secured, and there is less danger of injury to the arts.

It will of coursg be understood that the position of the parts may bereversed-that is to say, that the frame ofthe rebound check may bemounted on the running gear, and the attaching end; of the friction bandmay be secured te -the chassis-and the claims are to be understood. tocover this equivalent.

It may be pointed out further that the pin and slot connection in theconstruction shown in Figs.- 19',-and the strut 54 in Figs. 1011, serveto limitth'ethrow of the drum against the associated abutment member,viz, the shoe 35 in the one case, and the casing 50 in the other case.Too strong a grip the band between these lritign surfaces is thusprevented.

Various detail changes may be used in the construction which will beobvious to those skilled in the art. For example, the. stud 28 whichcarries the return spring may be moimted on the frame instead of on thedrum, without altering its function; of

frame adapted to be mounted on" the body portion of a vehicle, afriction drum eccentrically mounted on said frame, a friction bandsurrounding said drum and adapted to be drawn into gripping engagementwith and to swing the same, an abutment member cooperating with saidfriction member and toward which "the latter is swung by said band whenin gripping 'enga ement therewith, and means for securin t e end of saidband to the running ear 0 the vehicle.

2. Arebound chec devicecomprising a frame adapted to be mounted on thebody portion of the vehicle, a friction member eccentrically mounted onsaid frame, a friction band adapted to be drawn into gripping engagementwith said friction member and to swing the same, a yielding abutmentmember cooperating with said friction memher and toward which the latteris swung 'by said band when in ripping enga ement therewith, and meansor securing t e end of said band to the running gear of the vehicle.

3. A rebound check device comprising ,a frame adapted to be mounted onthe body portion of a vehicle, a friction drum eccentrica ly mounted onsaidv frame, a friction band surrounding said drum and adapted to bedrawn into gripping engagement with and to swing the same, an abutmentmember cooperating with said friction member and towardjywhich thelatter is swung by said band 'w' en in gripping'enga ement therewith, anmeans for securing t 6 end of said band to the running gear o f'thevehicle, together with a return spring; coiled within the drum fortaking up slack in the band on the approach of the running (gear andbody portions of the vehicle towar each other.

4. A rebound check device comprising a frame adapted to be mounted onthe body portion of a vehicle, a friction member eccentrically mountedonsaid frame, a friction'band adapted to be drawn into gripenga'gementwith said friction member andto swing the same, an'abutment membercooperating ,ith said friction member and toward whic the latter isswung by said bandwhen in gripping enga ement thereiith, and means forsecuring t e end of said nd to the running gear ofthe vehicle, tbgetherwith a return s ring for takinfg up in the band on t e approacho theaber and toward w ich the latter is swun running gear and body portionsof the vehicle toward each other, said return spring exerting a biasingeffort on said. friction member through saidband to move the frictionmember away from said abutment 70 member.

5. A rebound check device comprising a frame adapted to be mounted onthe body portion of a vehicle, a friction member eccentrically mountedon said frame, a friction band adapted to .be drawn into gripg pingengagement with said friction member and to swing the same, anadjustably yieldingabutment member cooperatin with said frictionmemberand toward whlch the lat 30 ter is swung by said band when in grippingengagement therewith, and means for securing the end of said band to therunning gear of the vehicle.

6. A rebound check device comprising a frame adapted to be mounted onthe body portion of a vehicle, a friction member eccentricall mounted onsaid frame, a friction ban adapted to be drawn into gripping engagementwith said friction member and to swing the same, an abutment membercooperating with said friction member and toward which the latter isswung by said band when in gripping engagement therewith, a springurging said abutment member toward the friction member, stop meanslimiting the approach of the abutment member towardthe friction memberunder the effort of said spring, and means for securing one end of saidband to'the running gear of the vehicle.

7. A rebound check device comprising a frame adapted to be mounted onthe body portion of a vehicle, a friction member eccentricall mounted onsaid frame, a friction ban adapted to be drawn into gripping engagementwith said friction memer and to swing the same, an abutment membercooperatin with said friction memby said band when in gripping engagementherewith, a spring urging said abutment member toward the friction:member, stop means limiting the approach of the abutment member towardthe friction member under the effort of said sprin means for varying theinitial stress of sai spring, and means for securing one end of saidband to the running gear of the vehicle. 1 8. A rebound check devicecomprising a frame adapted to be. mounted on the body portion of avehicle, a friction member eccentricall mounted on said frame, afriction'ban adapted to be drawn into gripping engagement with saidfriction mom-- er and to swing the same, an abutment member cooperatinwith said friction member and towar which the latter is swung: by saidband when in gripping en-' gagement therewith, a spring urging saidabutment member toward the friction member, stop means limiting theapproach of said spring, means for varying the initial stress of saidspring, meansfor indicating said stress, and means for securing one endof said band to the running gear of the vehicle.

9. A rebound check device comprising a pair of members havingsubstantially concentric friction surf-aces of substantially the samecurvature, one of said members being eccentrically mounted incombination with.

a friction band arranged between said surfaces and serving by its dragupon said eccentrically mounted member to swing the same toward thecooperating member to grip the band between them together with resilientmeans bpposin RICHARD T.- nnwron; v p

30' have signed my

